Which of the Following Can Cause a Phenotypic Change in an Organism

Question

Which of the following can cause a phenotypic change in an organism?
A) Too many chromosomes
B) Too few chromosomes
C) Changes in part of a chromosome
D) Too many chromosomes and too few chromosomes
E) All of these

Accepted Answer

All of these options can cause a phenotypic change in an organism. Changes in chromosome number (either too many or too few) and alterations in parts of chromosomes can all affect an organism's phenotype by altering the expression of genes.